Spanning Tree port configuration

By default for STP/PVST+, Spanning tree is turned Off for downlink ports (1-16), and turned On for cross-connect ports (17-18), and uplink ports (20-24). By default for RSTP/MSTP, Spanning tree is turned On for all downlink ports (1-16), all cross-connect ports (17-18), and all uplink ports (20-24), with downlink ports configured as Edge ports.

Spanning tree port parameters are used to modify STP operation on an individual port basis. STP port parameters include:

Port priority

Port path cost

The following table describes the Spanning Tree Port Configuration commands.

Table 85 Spanning Tree Port Configuration commands

Command

Description

spanning-tree stp {<1-32>}

Configures the port priority. The port priority helps determine

priority {<0-255>}

which bridge port becomes the designated port.

 

In a network topology that has multiple bridge ports connected to a

 

single segment, the port with the lowest port priority becomes the

 

designated port for the segment.

 

The range is 0 to 255, and the default is 128.

 

RSTP/MSTP: The range is 0 to 240, in steps of 16 (0, 16, 32...)

 

and the default is 128.

 

Command mode: Interface port

spanning-tree stp {<1-32>} path- cost {<1-200000000>}

Configures the port path cost. The port path cost is used to help determine the designated port for a segment. Generally speaking, the faster the port, the lower the path cost.

The range is 1 to 65535. The default is 10 for 100Mb/s ports, and 1 for Gigabit ports. A value of 0 indicates that the default cost will be computed for an auto-negotiated link speed.

RSTP/MSTP: The range is 1 – 200000000, and the default it 20000 for Gigabit ports.

Command mode: Interface port

spanning-tree stp {<1-32>} link {autop2pshared}

Defines the type of link connected to the port, as follows:

auto: Configures the port to detect the link type, and automatically match its settings.

p2p: Configures the port for Point-To-Point protocol.

shared: Configures the port to connect to a shared medium (usually a hub).

This command only applies when RSTP is turned on. See the “Common Internal Spanning Tree configuration” section for more information.

Command mode: Interface port

[no] spanning-tree stp {<1-32>} edge

Enables or disables this port as an edge port. An edge port is not connected to a bridge, and can begin forwarding traffic as soon as the link is up. Configure server ports as edge ports (enabled).

This command only applies when RSTP is turned on. See the “Common Internal Spanning Tree configuration” section for more information.

Command mode: Interface port

spanning-tree stp {<1-32>}

Enables or disables Port Fast Forward on the port.

fastforward

Command mode: Interface port

spanning-tree stp {<1-32>} enable

Enables STP on the port.

 

Command mode: Interface port

no spanning-tree stp {<1-32>}

Disables STP on the port.

enable

Command mode: Interface port

show interface gigabitethernet

Displays the current STP port parameters.

{<port number>} spanning-tree stp

Command mode: All

{<1-32>}

 

Configuration Commands 80

Page 80
Image 80
NEC N8406-022 manual Spanning Tree port configuration

N8406-022 specifications

The NEC N8406-022 is a robust and versatile networking device designed primarily for organizations requiring high-performance connectivity solutions. As part of NEC's extensive portfolio of networking equipment, the N8406-022 is engineered to address the demands of modern enterprise environments, ensuring seamless communication and data processing capabilities.

One of the key features of the N8406-022 is its multi-layer switching functionality. This device supports Layer 2 and Layer 3 switching, allowing for efficient data routing and reducing latency within local area networks (LANs). This capability is particularly beneficial for businesses that rely on real-time data access and transfer, such as those in financial services, media, and telecommunications.

The N8406-022 is equipped with advanced Quality of Service (QoS) features that help prioritize critical network traffic. This means that voice and video data packets can be given precedence over less time-sensitive information, ensuring that essential communication remains clear and uninterrupted. This is crucial for organizations leveraging VoIP and video conferencing solutions.

In terms of connectivity, the NEC N8406-022 offers a variety of ports, including multiple Gigabit Ethernet ports, which facilitate high-speed data transfer and enable seamless integration into existing network infrastructures. The device may also include 10 Gigabit SFP+ ports, providing the flexibility for high-capacity uplinks to support bandwidth-intensive applications and storage solutions.

Security is another focal point of the NEC N8406-022, with integrated features such as VLAN support, access control lists (ACLs), and port security measures. These capabilities protect sensitive data from unauthorized access and ensure that only legitimate users and devices can connect to the network.

Moreover, the N8406-022 often incorporates advanced energy-efficient technologies that minimize power consumption without compromising performance. This not only contributes to operational cost savings but also supports organizations in their sustainability efforts.

With its combination of performance, security, and energy efficiency, the NEC N8406-022 stands out as a reliable networking solution suitable for a wide range of enterprises looking to enhance their connectivity and operational efficiency. Whether deployed in data centers or as part of a corporate network, this device is built to meet the evolving demands of today’s digital landscape.